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Selected tag(s): carbon nanotubes

A. Length, B. Metals, C. Oxygen, D. Surface, or E. All of the Above?

John BalbusCal Baier-Anderson, Ph.D., is a Health Scientist.

The manufacture of carbon nanotubes (CNTs) is a very complicated business.  Different production processes leave behind different kinds of metal catalysts, which yield differences in physical and chemical – as well as toxicological – properties of the CNTs.  Read More »

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EPA’s Nano Consent Order, Part II: What About the Lifecycle?

Richard Denison, Ph.D., is a Senior Scientist.

Since my first post concerning EPA’s Consent Order, I’ve been reflecting further on the management conditions it imposes – or, more accurately, on what conditions it doesn’t impose.  The Order’s only such conditions address potential worker exposure.  What about the rest of the nanomaterial’s lifecycle? Read More »

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EPA’s Nano Consent Order, Part I: “Sanitized” Transparency is Still Very Revealing

Richard Denison, Ph.D., is a Senior Scientist.

[Part II of this post is available here.]

Word hit the street today that EPA intends to make public a “sanitized” version of a Consent Order it has negotiated with a producer of multiwalled carbon nanotubes (MWCNTs).  [A link will be provided once available.]  We obtained a copy of the Order, which has redacted all information claimed confidential by the company involved.  What can we learn from this well-scrubbed Order? Read More »

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Giving new meaning to the phrase “Insuring the safety of nanomaterials”

Richard Denison, Ph.D., is a Senior Scientist.

The insurance industry is out in front on nanotechnology yet again.  As the giant reinsurer Swiss Re did way back in May 2004 with its groundbreaking report Nanotechnology: Small matter, many unknowns, it is once again the insurance industry sounding an early alarm about nanomaterials.  In this case, it’s the Continental Western Insurance Group (CWG), which has just announced that it will exclude coverage for “the, as of yet, unknown and unknowable risks created by the products and processes that involve nanotubes.” Read More »

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Sticking Point: Nanotechnology, Lizard Feet, and Taping Grown Men to the Ceiling

John BalbusCal Baier-Anderson, Ph.D., is a Health Scientist.

We often think of nanotechnology as the latest product of ultra-modern science, but humans did not invent the nanoscale. We were not even the first to use materials with nanoscale features: The gecko beat us to it by several million years. Even more impressive, this little reptile has managed to use nanoscale materials apparently without experiencing any ill effects. It remains to be seen if we will be able to do this.
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Nano Down the Drain

John BalbusCal Baier-Anderson, Ph.D., is a Health Scientist.

The proliferation of nanoscale materials in consumer products is impressive:  nano titanium dioxide and zinc oxide in sunscreen, buckyballs in face creams, and nanosilver in socks are but a few examples of what is currently available for purchase.  But they make me wonder:  what happens when the nanomaterials in or released from these products are washed down the drain?   Read More »

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